Table 6.
Effect of different ratios of blue–red light in LED lighting on the growth parameters of kale microgreens.
| Treatment | Hypocotyl Length, cm |
Root Length, cm |
Leaf Area, cm2 |
Shoot Fresh Weight, mg |
Shoot Dry Weight, mg |
Root Fresh Weight, mg |
Root Dry Weight, mg |
Shoot-to-Root Ratio |
|---|---|---|---|---|---|---|---|---|
| B0R100 | 4.92 ± 0.20 a | 10.00 ± 0.36 a | 3.44 ± 0.20 a | 109.65 ± 6.58 ab | 6.24 ± 0.62 ab | 20.80 ± 1.96 b | 1.35 ± 0.14 c | 4.63 ± 0.07 b |
| B10R90 | 3.64 ± 0.24 b | 8.45 ± 1.26 a | 3.1 ± 0.25 a | 112.38 ± 5.92 ab | 7.23 ± 0.15 a | 28.65 ± 0.89 a | 1.72 ± 0.04 a | 4.20 ± 0.13 c |
| B25R75 | 3.67 ± 0.12 b | 9.04 ± 1.85 a | 3.0 ± 0.30 a | 116.19 ± 6.51 ab | 6.69 ± 0.12 ab | 28.02 ± 2.94 a | 1.61 ± 0.02 ab | 4.15 ± 0.14 c |
| B50R50 | 3.37 ± 0.13 b | 9.29 ± 0.83 a | 3.2 ± 0.29 a | 119.42 ± 6.65 a | 6.93 ± 0.26 a | 28.91 ± 2.06 a | 1.67 ± 0.14 ab | 4.15 ± 0.26 c |
| B75R25 | 3.38 ± 0.16 b | 8.2 ± 1.00 a | 2.9 ± 0.25 a | 100.14 ± 1.80 b | 5.82 ± 0.14 b | 23.01 ± 0.88 b | 1.44 ± 0.03 bc | 4.04 ± 0.13 c |
| B100R0 | 5.18 ± 0.14 a | 9.9 ± 0.85 a | 3.1 ± 0.17 a | 125.16 ± 8.64 a | 6.71 ± 0.61 ab | 22.60 ± 1.01 b | 1.29 ± 0.09 c | 5.18 ± 0.16 a |
B0R100, B10R90, B25R75 B50R50, B75R25, and B100R0: indicate the percentage of blue (B) and red (R) light. All values in the table are expressed as mean ± standard error (n = 3). Means with different letters are significantly different at the p < 0.05 level according to Tukey’s honestly significant difference test.